STILLWATER — Oklahoma State made a surprising addition to its 2013 recruiting class late last week, with JUCO offensive lineman Colby Hegewood signing a financial aid agreement to transfer to the school and join the Cowboys for fall camp.

Hegewood, who told Rivals he will start practice at right guard, will likely compete for immediate playing time.

He's not the only Cowboy arriving this fall who could see the field early. Here are some of the key positions that will need the most help from newcomers.

(Note: this list does not include midyear enrollees Sam Wren, Brandon Garrett and Naim Mustafaa)

Kicker/punter

Mike Gundy called OSU's kicking game poor at the beginning of spring ball and just average by the end. Not really a good start to the post-Quinn Sharp era.

But in comes Ben Grogan, who was rated the ninth-best kicker prospect in the nation by Rivals. As a high-school junior at Arlington (Texas) Martin, he won the starting job over Jaden Oberkrom, a Big 12 honorable mention selection as a true freshman for TCU last season.

Grogan's field-goal range extends beyond 50 yards. He also booms touchbacks with regularity and has excelled as a punter.

Cornerback

OSU had just four scholarship cornerbacks in spring football in Justin Gilbert, Kevin Peterson, Ashton Lampkin and Miketavious Jones.

That means the Cowboys will immediately rely on newcomers to add needed depth. Watch out for Jerel Morrow, who was rated a four-star “athlete” recruit, and Darius Curry, the younger brother of OSU redshirt freshman receiver C.J. Curry.

Running back

Joseph Randle's early departure for the NFL and Herschel Sims' dismissal last summer were a blow to depth at this position. So the Cowboys signed two backs in this class in Corion Webster and Rennie Childs.